Control of crystal phase of BiVO4 nanoparticles synthesized by microwave assisted method
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Different crystalline phases BiVO4 nanoparticles (tetragonal-zircon, monoclinic-scheelite, and tetragonal-zircon/monoclinic-scheelite heterophase) have been prepared by fast microwave assisted method and annealing treatment. For the heterophase, the ratio of tetragonal-zircon and monoclinic-scheelite phases can be well controlled by controlling the annealing temperature. Furthermore, a tight interface junction has been formed between tetragonal-zircon BiVO4 and monoclinic-scheelite BiVO4 in a nanosize level. This tight interface junction can modify the electronic structure of BiVO4 nanoparticles, which would be very helpful for achieving high photocatalytic activity.
KeywordsHigh Resolution Transmission Electron Microscopy High Resolution Transmission Electron Microscopy Scheelite High Photocatalytic Activity BiVO4
The authors would like to thank the Vietnam’s National Foundation for Science and Technology Development (NAFOSTED), Grant 103.02-2013.51 for financial support. X. B. Chen acknowledges the support by Wuhan Institute of Technology.